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But I want to broadcast a message in a LAN, and the suitable process accepting the packet has to reply to the sender.

Ques... How to do this? Is it also performed using sockets?Every socket has two endpoints.For sender these are <Senders Address>, <Broadcast Address>For receiver, <Receivers Address>, <Senders Address>But the senders address is unknown and hence its remote end point is not defined, so how to do it using sockets??